Came in this morning and multiple webpages on all browsers are having issues with multiple websites. I can't seem to find the issue. It seems like every site has a https log in is where the error is coming. It's happening across all computers on the domain now.

I can get to some of them if I type out the https but they are not automatically forwarding over like they should be.

*Edit* I guess it's not just HTTPS I've attached a screen of one that isn't.

If this just started happening this morning across multiple machines......then it may be directly related to whatever configuration changes or updates that might have been applied late last week. Go back in time and figure out what was done to the network last week, start with Friday and work backwards until you find the change that put down the network. Maybe some firmware update or something.

Well nothing that I can see what changed. In the change log there was nothing that had been done in the past two weeks other than a couple preference changes.

I went into the event log and finally saw something new when a few machines were trying to update avast (that was being blocked too.) I white listed the ID it gave me for the block and that lit everything back up. I guess now I just need to worry about why the firewall was blocking all of that in the first place. Because I had no settings in place to do so.

I asked Meraki if they knew anything about the ID I had to whitelist. They responded with:

Thanks for contacting Meraki.

Kaspersky, who provides the security filtering signatures and lists, made a series of updates this weekend. We're working with them to get the lists corrected, but in the meantime we do recommend whitelisting ID D41D8CD9. This will eliminate the erroneous blocks while leaving security filtering enabled. I apologize for any inconvenience.